I have a legacy Linux System which has some processes ( manually or automatically started ) running under different users. The server is not restarted since long time, and current staff doesn't know what specifically must be run there and what to start manually after restart.

I have to do a storage migration so that, I'll shutdown and restart it.

In Windows, I can open services.msc and note "manually started" and "automatically but stopped" processes for proper restart even if I don't know what is running there.

What is the procedure for Linux to learn exactly what to restart or what to stop and how to do it after proper reboot ?

Can you set up a copy to experiment? You should consider installing and upgrading a new machine, and migrating this stuff there (2 years without kernel and other updates... shudder).
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vonbrandFeb 18 '13 at 2:13